Lawn-mower.



A. BERENS.

LAWN MOWER.

APPLICATION FILED APR.12, 1909.

944,712. Patented Dec. 28, 1909.

AUGUST BRENS, 0F CHICAGO, ILLINOIS.

LAWN-MOWER.

Specification of Letters Patent.

Application led April 12, 1909.

Patented Dec. 28, 1909.

serial No. 489,274.

T 0 all whom it may concern:

Be it known that I, AUGUST BERENS, a citizen of the United States, and resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Lawn-Mowers, of which the following is a full and correct specification, reference being had to the hereto accompanying drawing, forming a part hereof, and in which- Figure l is a lawn mower in top plan View in which some of the parts are shown broken away. Fig. Q is a sectional end view of Fig. l taken on the cutting plane 2 2 of Fig. l. Fig. 3 is a sectional end view of Fig. l on the cutting plane 3 3 of Fig. l. Fig. 4 is a sectional end view on the cutting plane Ll #l of Fig. l. Fig. 5 is a rear view of one of the sockets n.

Like reference letters denote like parts throughout.

The object of my invention is to provide an economic and simple construction of mechanism for actuating one or two sicklebars of a lawn mower. To attain said desirable end I superimpose two sickle-bars z' 7L and so arrange the sickles thereon and their propelling mechanism that only one half of the motion of each sickle-bar is required that a single sickle-bar would need and, consequently, less friction is encountered, besides other advantages which will be pointed out.

The wheel mechanism and other parts, as a c (Z el d2 Z3 d* is of the usual construction found on what is known as the Philadelphia lawn mower'. To the shaft Z of said mower are attached two circular wabblecams e which play in sockets n provided with anti-friction rollers 0 against which play, alternately, the sides of said cams. Each of said sockets with its rollers is attached to a separate sickle-bar, as z' and 7L, the former provided with a bead c" which plays in a groove 7i of the sickle-bar 7L and both of said bars rest and play on a channel shaped bar g which rests on arms f which form integral parts of the disks Zt of the wheels a, and the rear edges of said bars play against the shoulders n2 of the sockets n and from said socket also rise the L-shapcd l l l arms m which support the bar Z to which are attached the guards 7c over the sicklecutters 71.2 2.

Arms 71: on the bar Z reach to the stud 7a2 which connects them with the brackets or arms f integral with the disks (Z4 which thereby hold the shields 7c rigidly to place.

To each of the sickle-bars 7i and c' is attached a socket n provided with anti-friction rollers o and against said rollers play, alternately, the opposite faces of the wabblecams e which, thereby, thrust said sicklebars in their longitudinal directions.

By providing two sickle-bars and wabblecams, and inverting, relatively to each other, the sickle-blades, the cutting edges are doubled and, consequently, the motion of the sickle-bars is reduced to one half, and through said reduction the pitch of the wahble-cams is also reduced and consequently their friction reduced to less than one half because the cams act like wedges whose power, when sharpened increases in greater proportion.

A roller Z3 immediately under the rear edges of the sickle-bars keeps the'sickles at proper elevation from the ground.

It is plainly evidentthat this double construction of sickle-bars and their actuating mechanism may be reduced to a single bar and its single actuating mechanism without greatly altering the principle of my said construction.

What I claim is:

The combination with wabbling cams and means driven by said cams, the cams being pitched to throw said means in opposite directions and to complete one vibration for each cam-revolution, of superimposed sicklebars actuated by said means, tongued and grooved mechanism to guide one sickle-bar on the other, and means under the lower sickle-bar to guide and carry it, and carrying-arms under the lower sickle-bai: and a machine-frame to which said arms are connected.

AUGUST BER-ENS. A

Witnesses IVM. ZIMMERMAN, M. SULLIVAN. 

